Spiritual Weapon + Divine power, more attacks?

[WattsHumphrey]

For a cleric with the War Domain, he can choose between Flame Strike and MaxSW in his 5th level Domain slot. I can imagine days when I'd choose either.

-Hyp.

I thought you couldn't choose a metamagicked version of a spell as a domain slot...?

Now I'm going to have to look that up when I get home, though